On 9/17/2010 1:11 PM, Jon Anderson wrote:
Bought an LED ring light for my B&L microscope, a great investment!
http://cgi.ebay.com/ws/eBayISAPI.dll...m=400017698337

Looking at the large ID of this, I realized I could easily poke the lens of my Minolta Z6 through the center. I have in fact, an adapter tube for this camera allowing me to use my collection of 52mm filters.
I'm making an adapter to mount the LED ring light to this adapter tube.
For most uses, I would just use the wall wart power supply. However it might be interesting to take shots outside with this setup. The power supply is a 12v 500mA.

Remote garage door openers use a small 12v battery, and there might be other compact 12v batteries, but I was wondering if it's possible to run this off a 9v battery? Of course, I'm not worried about getting hours and hours of use out of a battery. It would just be nice to be able to take a few
shots away from an outlet, and a small battery I could rubber band to the light right would be great. I am interested in trying to use a 9v battery because they are more widely available than the small 12v batteries. But don't know enough to know if the lower voltage might somehow damage the
circuitry. Anyone venture an answer?

This would be a great use for your spare 12V drill battery.

I was faced with a similar problem. I gutted a broken charger
and used it to power a project in the field.

http://www.metalworking.com/dropbox/PowerOut.txt
http://www.metalworking.com/dropbox/PowerOut.JPG



--Winston